- impertinent, irreverent, pert, saucy - characterized by a lightly pert and exuberant quality; "a certain irreverent gaiety and ease of manner"
Antonym: spiritless (indirect, via spirited)
- fresh, impertinent, impudent, overbold, smart, saucy, sassy - improperly forward or bold; "don't be fresh with me"; "impertinent of a child to lecture a grownup"; "an impudent boy given to insulting strangers"
Antonym: backward (indirect, via forward)